For a Wien-bridge oscillator, in order to produce proper oscilation, the attenuation ratio of Vout to Vin must be
A) 3 to 1 B) 2 to 1 C) 1 to 3 D) 1 to 2
C
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Describe what could cause all of the firing voltage lines to be abnormally low on an oscilloscope display.
What will be an ideal response?
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The ____________________ hand torch is the most common type of oxyfuel gas torch used for welding and cutting.
Fill in the blank(s) with the appropriate word(s).
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The three-hinged parabolic arch in Figure P6.24 supports 60-kip load at the quarter points. Determine the shear, axial load, and moment on sections an infinitesimal distance to the left and right of the loads. The equation for the arch axis is y = 4hx 2 /L 2 .
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Before brazing, the outside of the tubing should be cleaned to a _____
A) satin finish B) dark finish C) dull finish D) bright finish
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